Feature Analytics Instrumentation Planner
mistralai/mistral-vibe
Plans which analytics events and properties a new feature needs, checks them against the existing event registry, and verifies them per environment.
Helps an Amplitude user design a custom agent by proposing use cases that fit their role and data, shaping a spec, and returning a Global Agent link that builds it.
Install Amplitude Custom Agent Builder
$ npx skills add amplitude/builder-skills --skill create-custom-agent -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install amplitude/builder-skills create-custom-agent --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/amplitude/builder-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/analytics-skills/skills/create-custom-agent .claude/skills/create-custom-agent && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "create-custom-agent" agent skill from https://github.com/amplitude/builder-skills/tree/main/analytics-skills/skills/create-custom-agent into .claude/skills/create-custom-agent/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "create-custom-agent", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/amplitude/builder-skills/tree/main/analytics-skills/skills/create-custom-agentType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add amplitude/builder-skills --skill create-custom-agent -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install amplitude/builder-skills create-custom-agent --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/amplitude/builder-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/analytics-skills/skills/create-custom-agent .agents/skills/create-custom-agent && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "create-custom-agent" agent skill from https://github.com/amplitude/builder-skills/tree/main/analytics-skills/skills/create-custom-agent into .agents/skills/create-custom-agent/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "create-custom-agent", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add amplitude/builder-skills --skill create-custom-agent -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install amplitude/builder-skills create-custom-agent --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/amplitude/builder-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/analytics-skills/skills/create-custom-agent .cursor/skills/create-custom-agent && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "create-custom-agent" agent skill from https://github.com/amplitude/builder-skills/tree/main/analytics-skills/skills/create-custom-agent into .cursor/skills/create-custom-agent/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "create-custom-agent", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/amplitude/builder-skills.git --path analytics-skills/skills/create-custom-agent--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add amplitude/builder-skills --skill create-custom-agent -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install amplitude/builder-skills create-custom-agent --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/amplitude/builder-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/analytics-skills/skills/create-custom-agent .gemini/skills/create-custom-agent && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "create-custom-agent" agent skill from https://github.com/amplitude/builder-skills/tree/main/analytics-skills/skills/create-custom-agent into .gemini/skills/create-custom-agent/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "create-custom-agent", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install amplitude/builder-skills create-custom-agentInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add amplitude/builder-skills --skill create-custom-agent -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/amplitude/builder-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/analytics-skills/skills/create-custom-agent .github/skills/create-custom-agent && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "create-custom-agent" agent skill from https://github.com/amplitude/builder-skills/tree/main/analytics-skills/skills/create-custom-agent into .github/skills/create-custom-agent/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "create-custom-agent", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add amplitude/builder-skills --skill create-custom-agent -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install amplitude/builder-skills create-custom-agent --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/amplitude/builder-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/analytics-skills/skills/create-custom-agent .opencode/skills/create-custom-agent && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "create-custom-agent" agent skill from https://github.com/amplitude/builder-skills/tree/main/analytics-skills/skills/create-custom-agent into .opencode/skills/create-custom-agent/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "create-custom-agent", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
create-custom-agent- GitHub stars
- 159
- Token cost
- ~2.5k tokens
- SKILL.md length
- 1,414 words
- Files
- 5 (incl. references)
- Skills in repo
- 62
- Repo updated
- First seen
- Licence
- None found
At a glance
Helps an Amplitude user design a custom agent by proposing use cases that fit their role and data, shaping a spec, and returning a Global Agent link that builds it.
- Works in 7 steps: Open with grounded suggestions → Ground in their data (optional, when… → Offer a Global Agent brainstorm link… → …
- Setting up a custom agent in Amplitude and unsure what it should do
- SKILL.md covers How to behave (read this first), Step 1 - Open with grounded…, Step 2 - Ground in their data… and Step 3 - Offer a Global Agent…, plus 5 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
The skill does not create agents itself, since there is no API for that. Instead it produces a fully specified prompt and a clickable Global Agent deeplink, plus the same prompt as plain text. You open the link, review the draft in Global Agent, and Global Agent configures the agent. It reads reference files on use cases, best practices, prompt wording and worked examples before suggesting anything.
It starts the conversation with two or three concrete ideas rather than a blank question, drawn from what is known about your role and team, from your real Amplitude projects and top events when reachable, and from a catalog of agents by role and Agent Library category. It talks in prose without multiple-choice menus, and if your idea matches a built-in Specialized Agent it mentions that and keeps helping, since a custom agent can still add scoping, a schedule or delivery. The excerpt is cut off after the grounding steps.
When your agent uses it
- Setting up a custom agent in Amplitude and unsure what it should do
- Automating a recurring analysis you currently run by hand
- Putting a repeated report on a schedule with an Amplitude agent
- Turning a rough agent idea into a well-formed prompt
Example prompts
- “Help me build a custom Amplitude agent that summarizes weekly signup funnel changes.”
- “I run growth marketing; suggest a few agents I could create from my top events.”
- “Turn this idea into a Global Agent link: a Monday report on checkout drop-off.”
- “I repeat the same retention analysis every month, so schedule it as an agent.”
Requirements
- An Amplitude account with access to Global Agent
Workflow steps
7 steps, taken from the step headings in SKILL.md.
- Open with grounded suggestions
- Ground in their data (optional, when Amplitude MCP is available)
- Offer a Global Agent brainstorm link (portable fallback)
- Shape the chosen idea (the intake)
- Assemble the prompt
- Build the deeplink
- Deliver
What it can do on your machine
Read from SKILL.md and the folder at commit 51838c2. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Amplitude Custom Agent Builder loads about 2.5k tokens when it runs, and up to ~5.8k if it reads all its reference files. Until then it costs about 91 tokens; SKILL.md has 1,414 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
Without a licence we can't republish the file, so here is its outline and opening line. It has 1,414 words (~2,508 tokens).
“Help someone build a custom agent in Amplitude. The job of this skill is to make that easy and specific: suggest strong ideas grounded in what you know about the person and their data, shape the chosen idea into a…”
- name
- create-custom-agent
- suggest_when
- User says "create a custom agent", "build an agent", "automate this analysis", "put this report on a schedule", or describes a recurring workflow they run by…
Files
SKILL.md and 4 other files (references) in analytics-skills/skills/create-custom-agent of amplitude/builder-skills.
- SKILL.md
- references/best-practices.md
- references/examples.md
- references/prompting-instructions.md
- references/use-cases.md
Open the folder on GitHubat commit 51838c2
Compare with similar skills
Amplitude Custom Agent Builder next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Amplitude Custom Agent Builder this skillamplitude/builder-skills | 159 | — | ~2.5k | Automated safety check: Pass | None | |
| Feature Analytics Instrumentation Plannermistralai/mistral-vibe | 5.1k | — | ~2.2k | Automated safety check: Pass | Apache-2.0 | |
| A/B Test Analysisphuryn/pm-skills | 27k | — | ~893 | Automated safety check: Pass | MIT | |
| Cohort Analysis and Retention Explorerphuryn/pm-skills | 27k | — | ~1.3k | Automated safety check: Pass | MIT | |
| Product Metrics Dashboard Designphuryn/pm-skills | 27k | — | ~1.3k | Automated safety check: Pass | MIT | |
| Data And Funnel Analyticsmanojbajaj95/claude-gtm-plugin | 104 | — | ~2.9k | Automated safety check: Pass | MIT |
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Related
Questions about Amplitude Custom Agent Builder
What does Amplitude Custom Agent Builder do?
Helps an Amplitude user design a custom agent by proposing use cases that fit their role and data, shaping a spec, and returning a Global Agent link that builds it. The skill does not create agents itself, since there is no API for that. Instead it produces a fully specified prompt and a clickable Global Agent deeplink, plus the same prompt as plain text.
When should I use Amplitude Custom Agent Builder?
Amplitude Custom Agent Builder fits situations like: setting up a custom agent in Amplitude and unsure what it should do; automating a recurring analysis you currently run by hand; putting a repeated report on a schedule with an Amplitude agent; turning a rough agent idea into a well-formed prompt.
How do I install Amplitude Custom Agent Builder in Claude Code?
Run `npx skills add amplitude/builder-skills --skill create-custom-agent -a claude-code`. Or copy the skill folder (analytics-skills/skills/create-custom-agent in amplitude/builder-skills) into .claude/skills/create-custom-agent in your project. Claude Code loads it when a task matches its description.
How do I install Amplitude Custom Agent Builder in Codex?
Run `npx skills add amplitude/builder-skills --skill create-custom-agent -a codex`. Or copy the skill folder (analytics-skills/skills/create-custom-agent in amplitude/builder-skills) into .agents/skills/create-custom-agent in your project. Codex loads it when a task matches its description.
Can I use Amplitude Custom Agent Builder in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add amplitude/builder-skills --skill create-custom-agent -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/create-custom-agent, .gemini/skills/create-custom-agent, .github/skills/create-custom-agent and .opencode/skills/create-custom-agent in your project.
What does Amplitude Custom Agent Builder need to run?
SKILL.md names no scripts, command-line tools or credentials: Amplitude Custom Agent Builder is instructions for the agent only. Our summary lists: An Amplitude account with access to Global Agent.
Does Amplitude Custom Agent Builder access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Amplitude Custom Agent Builder safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Amplitude Custom Agent Builder use?
No licence was found for Amplitude Custom Agent Builder or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Amplitude Custom Agent Builder use?
About 2.5k tokens (SKILL.md is roughly 10k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 3.3k tokens, read only when the agent opens those files.
What are the alternatives to Amplitude Custom Agent Builder?
Skills that share tags, products or a category with Amplitude Custom Agent Builder: Feature Analytics Instrumentation Planner (mistralai/mistral-vibe, 5.1k stars), A/B Test Analysis (phuryn/pm-skills, 27k stars), Cohort Analysis and Retention Explorer (phuryn/pm-skills, 27k stars) and Product Metrics Dashboard Design (phuryn/pm-skills, 27k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Amplitude Custom Agent Builder?
amplitude (a GitHub organization) maintains it in amplitude/builder-skills, which has 159 GitHub stars. The repository holds 62 skills in this directory. The repository was last updated on July 24, 2026.
Source: amplitude/builder-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.